dm: core: remove orphaned parameter description in platdata.h

struct driver_info has no field 'flags'.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/dm/platdata.h

@@ -23,7 +23,6 @@
  * @name:	Driver name
  * @platdata:	Driver-specific platform data
  * @platdata_size: Size of platform data structure
- * @flags:	Platform data flags (DM_FLAG_...)
  */
 struct driver_info {
 	const char *name;